33.1: The Yukawa Particle and the Heisenberg Uncertainty Principle Revisited

33.2: The Four Basic Forces (8)

33.3: Accelerators Create Matter from Energy (6)

33.4: Particles, Patterns, and Conservation Laws (2)

33.5: Quarks: Is That All There Is? (2)

33.6: GUTs: The Unification of Forces

Chapter 34: Frontiers of Physics

34.1: Cosmology and Particle Physics

34.2: General Relativity and Quantum Gravity

34.3: Superstrings

34.4: Dark Matter and Closure

34.5: Complexity and Chaos

34.6: High-temperature Superconductors

34.7: Some Questions We Know to Ask

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